/*************************************************************************
	> File Name: 146.字符串.c
	> Author: xiangpeng cai
	> Mail: 
	> Created Time: Sun 04 Jul 2021 07:00:23 AM PDT
 ************************************************************************/

#include<stdio.h>
#include<string.h>

char input[51];

int main() {
    scanf("%s", input);

    int len = strlen(input);
    for (int i = 0; i < len; i++) {
        if (input[i] >= 'A' && input[i] <= 'Z') {
            input[i] = 'A' + (input[i] - 'A' + 1) % 26;
        } else if (input[i] >= 'a' && input[i] <= 'z') {
            input[i] = 'a' + (input[i] - 'a' + 1) % 26;
        } else 
            continue;
    }
    printf("%s\n", input);
    return 0;
}
